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Sox say so long to John Hancock. But hello maybe to MassMutual. - The Boston Globe
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Yankees Announce Starr Insurance Jersey Patch, Partnership in Video, News, Scores, Highlights, Stats, and Rumors
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The Boston Red Sox announced a major off-the-field partnership with MassMutual
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A rough patch: the Astros' new sponsorship deal with Oxy is doubly ugly, Houston Astros
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Red Sox, MassMutual near a $17M jersey patch deal - Boston Business Journal
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Boston Red Sox make history with record $170 million ad-patch deal, other teams to follow suit
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Red Sox to sport MassMutual logo under new partnership - Boston Business Journal
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Red Sox, MassMutual near a $17M jersey patch deal - Boston Business Journal
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MLB Jersey Patch Market Warming Up As Season Approaches